Fuel is intended for use in marine high- and medium-speed diesel engines as well as gas turbine plants. It is made from diesel fractions with the addition of light gas oils of secondary processes. Unlike diesel, it has a lower cetane number and a higher sulfur content.

BF types: bunker fuel is divided into two types by its characteristics: light and heavy. Heavy fuel is a fleet fuel oil, it is also called residual heavy fuel used in power plants on ships. Light fuel is considered to be low-viscosity marine fuel (SMT), low-viscosity marine fuel (TCM) or naval diesel fuel, which is used on ships equipped with high-turnover and medium-rotary internal combustion engines.